P.C. de Jagher, H.J. Hopman and J.B. Vrijdaghs, On the resolution of retarding field energy analysers: Part 2. The influence of space charge, J. Phys. E 8, 117-122 (1975)
T.P. Hoogkamer, F.W. Saris and F.J. de Heer, Measurements of the L-shell fluorescence yields of Ar and Cl by electron impact, J. Phys. B: At., Mol. Opt. Phys. 8, 105-108 (1975)
W.C. Turkenburg, E. de Haas, A.F. Neuteboom, J. Ladru and H.H. Kersten, A universal target manipulator for use in ultra-high vacuum, Nucl. Instrum. Methods 126, 241-245 (1975)